请教大全2-18

18.
        Lark
Manufacturing Company initiated a voluntary Quality Circles program for machine
operators. Independent surveys of employee attitudes indicated that the machine
operators participating in the program were less satisfied with their work
situations after two years of the program’s existence than they were at the
program’s start. Obviously, any workers who participate in a Quality Circles
program will, as a result, become less satisfied with their jobs.

Each of the following, if true, would weaken the conclusion
drawn above EXCEPT:

(A) The second survey occurred
during a period of recession when rumors of cutbacks and layoffs at Lark
Manufacturing were plentiful.

(B) The surveys also showed that
those Lark machine operators who neither participated in Quality Circles nor
knew anyone who did so reported the same degree of lessened satisfaction with
their work situations as did the Lark machine operators who participated in
Quality Circles.

(C) While participating in
Quality Circles at Lark Manufacturing, machine operators exhibited two of the
primary indicators of improved job satisfaction: increased productivity and
decreased absenteeism.

(D) Several workers at Lark
Manufacturing who had participated in Quality Circles while employed at other
companies reported that, while participating in Quality Circles in their
previous companies, their work satisfaction had increased.（E）

(E) The machine operators who
participated in Quality Circles reported that, when the program started, they
felt that participation might improve their work situations.

Answer: E

我选了B..不是很理解..